Sickle mower attachment



Oct. 7, 1941. E. L. RosE sIcxLE MowER ATTACHMENT 5 Sheets-Sheet l Filed May 2, 1941 www l l l gmc/WM Oct. 7, 1941. E. ROSE SICKLE MOWER ATTACHMENT Filed May 2, 1941 5 Sheets-Sheet 2 Oct. 7, 1941. E.. L. RosE 2,258,517

SICKLE MOWER ATTACHMENT Filed May 2, 1941 5 sheets-shea s Patented Oct. 7,1941

UNITED* jsTAr as PM'ENT oFFicE srcxu: Mower; ATTACHMENT f Eustace L. Rose, Charleston, W. Ya., assigner toA Gravely Motor Plow t Cultivator Co.. Dunbar.

W. Va.

Alipucaum any" z, 1941, semi No. 391,610

' 15 Claims.

This invention relates to an improved driving means for a sickle mower.

An object of this invention is to provide an improved operating means for a sickle mower which may be attached to a power unit for trans- 'lating rotary movement to reciprocatory movewill impart a reverse counter-balancing movement to the stationary cutter bar so that cuttings will not collect on the stationary cutter and so Tol the foregoing objects' and others which may hereinafter appear, the invention consists `of the novel construction, combination and arrangement of parts as vwill be morespeciflcally 'referred to and illustrated in the accompanying drawings, wherein is shown an embodiment of-v the invention, but it is to be understood that changes, variations and modifications may be resorted to which :au 'within the scope of the '1nvention as claimed.

In the drawings: i Figure l is a horizontal section partly broken away and in detail of a combined driving mecha'- nism and cutter means constructed according as Ito reduce or smooth out. the vibrations of the device.

A further object of this invention is to provide an attachment of this kind in which the reciprocatory movement of the movable cutter bar is effected by means of a rotary wabble structure. A further object of this invention is to provide an attachment of this kind in which one cutter member is movable relative to the other cutter member,- and the length of the movement of each cutter member is proportionate to the weight thereof so as to thereby provide a, substantially even balance between the cutter members and permit the use of a relatively small power device.

A further object of this invention is to provide a device of this kind which is so constructed and arranged as to eliminate the usual hammering caused by operation of the device at high speed.

A further object of this invention is to provide a mower attachment of this kind wherein the mower may freely swivel with respect to the power unit so that the mower may follow the un dulations in the terrain independent of the power unit.

' A further object of this invention is to provide in a device of this kind a pivoted connecting 4lever between the driving crank and the knife bar and a mounting for the lever which will permit endwse movement of the lever and in which the force actuatingthe knife bar is also used to and guard bar, so as to provide a scissor action in which the heavier or lower part thereof has a substantially shorter movement than the upper part and thereby constitutes a counter-balancing means for smoothing, out the vibrations or the device at any speed.

, exert a counter movement to the lower cutter I to arr embodiment of this invention,

YFigure 2 is a fragmentary vertical section partly broken away and in detail of the device,

Figure 3 is a sectional view take'non the line 3-3 of Figure 2,

Figure 4 is an enlarged fragmentary sectional` view of the driving means, and l Figure 5 is a sectional view taken on the line 5--5 of Figure 2. Referring to the drawings, the numeral III4 designates generally av tubular housing, which is adapted to be connected to a suitable power eans in the form of a power take-off or the ke. housing member I I andan outer tubular member I2 telescoping the inner member II. The inner member I I is formed at its rear end with a shoulder I3. against which the rear end of the housing I2 is adapted to abut. The inner housing member II is also provided with a flanged rear end I4, which is adapted to be bolted to the power take-off means. v

The forward end of the housing I2 is provided with an annular member I5 and an annular flange I6 rearwardly of the annular member I5. A housing Il, which is formed with a rear wall I8 having an opening I9, is adapted to engage on theannular member I5 and abut against the flange I8. The housing member I 1 is secured to the flange I6 by vfasteningv devices 20. A drive shaft 2l is rotatably disposed within the housing I0 and also extends within the housing member I1. The shaft 2| is substantially smaller in diameter than the inner diameter of the inner tubular member II and is rotatably supported at its rear end by an anti-friction bearing member 22. The bearing member 22 includes an inner race 23, which engages about the shaft 2l and an outer race 24, which engages in the seat 25 formed in the plate 2l forming the rear end portion of the housing II. Roller bearings 21 are The housing I0 includes an inner tubular -iiange 44.

members 8| and 64 engage within annularv seats interposed :between the two race members 23 and 24. The anti-friction bearing 23 also-constitutes a thrust bearing and a. packing ring 28 is disposed about the shaft 2| inward1y from the anti-friction bearing 22 and is seated in an annular seat on the shaft 2| and -includes an inner race member 35, an outer race member 36 and rollers 31. 'I'he bearing 35 is a thrust bearing which is disposed in opposed relation to the thrust bearing 22', and the bearing 34 engages in a bearing seat 38, which is formed in the annulus I5.

A sealing washer 39 is disposed-about the shaft' 2| rearwardly from the bearing 34 and seats within the interior of the housing member |2 forwardly from the forward end of the inner housing member Il.

'I'he shaft 2| is formed with an annular collar 40, which is adapted to abut against the 81 and 88 respectively, which are formed withinthe annulus 66. The annulus 68 also includes `an intermediate or dividing rib 69, which engages between the two race members 6| and 34, so as to hold these two race members in spaced apart relation.

The annulus 66 is provided with a pair of dia-` metrically opposed trunnions '10 Awhich engage in a pair of bearings 1| carried by a split annulus 12. The split annulus 12 has secured to Vone portion 13 thereof a vertically disposed trunnion l14, which engages within a rbearing housing 15 carried by the top wall 16 of the housing |1. A cylindrical bearing 11 isdis posed about the trunnion14 and engages with- .in the bearing housing 15. An annular thrust washer '18 is mounted in a seat 19 formed in the inner endportion of the bearing housing 15 so 'as to take vup 'endwise thrust of the annulus 12 in an upward direction. The split bearingv 1| is held tightly together by means of bolts or bearing member 34, so that tightening of the nut 32 on the rear end of the shaft 2| will firmly hold the two bearing m^embers 22 and 34 in the housing members and I2. The flange or rib 40 is disposed within the housing member |1 and the shaft 2| within the housing |1 is formed with a splined section 4| and a reduced stub 42 extending from the splined section 4|. A cylin-v -drical bearing 43 engages about the stub shaft 42 and is formed at its rear end with an annular The housing I1 is formed with a' forward wall 45.having an annular opening 46 within which an anti-friction bearing 41 is adapted to engage. 'Ihe bearing 41 includes an outer .race member 48, an inner race member 49 and rollers 50. The inner race member 49 is adapted to abut against the collar or ange 44 and a cap 5| is secured by fastening devicesV 52 to the forward wall 45 of the housing |1 and is provided with an annular rib 53, which bears against theouter race member 48'.

The shaft 2| within'the housing member |1 hasE mounted thereon a splined wabbleblock 54,

which engages `the splined section 4|. The

I block 54 includes a cylindrical member 55, which is disposed at an angle to the longitudinal axis of the 'shaft 2| and an annular flange 56 is formed at one end of the cylindrical member 55. A pair Lof anti-friction bearings 51 and 58 are mounted on the cylindrical member 55 and the bearing member 58 is held against endwise move-'- ment by means of a threaded nut 59 engaging the cylindrical member 55 at the end thereof opposite from the flange V56. The bearing member 51 includes an inner racemember 6|) mounted on the-cylindrical member 55 and abutting at its outer portion the flange 56. Thebearing 51 also includes an outer race member 6| and rollers 82 interposed between the two race members.

60 and 8|. The bearing member 58 includes an inner race member 63 engaging the cylindrical member 55 an'd abutting/'against the nut 59. The bearing member' 58 also includes an outer race member 84 and rollers 85. interposed between the two race members 63 and 64.

fastening devices 80. 'I'he annulus 12 also includes a lower substantially semi-circular member 8|, which is formed with a trunnion or stub shaft-82. The trunnion or stub shaft 82 engages within a bearing housing 83 formed in 89 formed in the outer or lower end of the bearing housing 83.

The stub shaft or trunnion 82 extends below the bearing housing 83 and is `formed with a tapered lower end portion 90 having splines 9|. A threaded stub 92 extends from the tapered coupling member 9| vand a nut 93 is adapted to be threaded onto the threaded stub 92. As shown in Figure 3, the upperend of the bearing housing 15 is open and a removable disc-shaped closure 94 is adapted to engage in an annular seat 95 formed in the outer end portion of the housing 15. The closure 94 is constructed in the form of a thin disc, which is pressed into the recess 15 Aand which is adapted to assume'an arcuate configuration las shown in Figures 2 A relatively short crank 95 having ,a hub 96 is mounted on the tapered splined section 90 of the stub shaft 82, being held thereon by the nut 93. The crank 95 has a. bearing 91 at the opposite end thereof and the tapered end portion 98 of a stub shaft 99 engages in the bearing hub 91. The stub shaft 99 at the smaller end thereof is provided with a threaded section on which a holding nut |00 is threaded. The stub shaft 99 engages within an annular bearing member 0| carried by a pitman generally designated as |02. The pitman |02 has mounted in the bearing member |0| thereof a flanged bearing lining |03 andthe stub shaft 99 is formed at its lower end with a ange |04 vabut-v 'in spaced relation to the adjacent end of the annulus `Gli is disposed about the antifriction bearings 51 and 58 and the outer race pitman |02.

The pitman |02 at a point intermediate the ends thereof is provided with a ball member |08 which engages in a split socket |01 having a opening -or chamber |24 and pass upwardly through the duct4 |40 and the lateral ducts 4|.

f A rubber orA resilient annulus |43 is interposed has a reverted portion ||3 which tightly engages about the surface of the trunnion |02 rearward- 1y from the ball member |06. A secondV resilient sealing member ||4 engages about the trunnion |02 forwardly from the ball |06 and is provided with an annulartrib ||5 engaging in` an annular groove ||6 formed in the cylindrical housing |09 forwardly 'from the ball |06. 'I'he sealing member ||4 also includes a substantially cylindrical inner part |1 tightly engaging about the pitman |02 so as to prevent any `dirt or foreign matter from entering the interior of the housing |09. `The bearing housing |09 is removably mounted in a cylindrical split housing ||8, which is split, as at H9, at thelower lside thereof ,and formed with earsV |20, which are bolted together by bolts |2| so that the cylindrical bearing housing |09 may be tightly held within the outer housing 4| I8. In order to provide a means whereby the inner bearing housing |09 may be accurately and properly positioned within the outer housing H8, the bearing housing |09 is formed with a transversely extending groove or key-way |23, which is complementary to the key-way |02 and a positioning pin or key |24 engages in the confrontingvkey-ways |22 and |23.

The key or pin |24 is formed with an axial lubricating duct |25, which communicates through radial openings |26 with an4 annular groove |21 formed in the pin |24. A duct4 |28 is formed in the inner bearing housing |09 and communicates with the groove |21, so that a lubricant discharged into the duct |25 will enter the interior of the inner housing |09 in order that the ball socket |01 may have free endwise movement within the inner housing or bearing |09. A lubricant fitting |29 may be mounted on one end of the key or pin |24 so as to facilitate the discharge of a suitable lubricant into the duct |25. n

The outer housing ||8 is fixed or formed integral with a swinging bracket |30. The bracket |30 extends vertically upwardly from the housing ||8 and is formed aty its upper portion with a rearwardly `extending arcuate extension |3| which mergesinto an annulus |32. The annulus |32 loosely engages about the exterior of the bearing housing and a rearwardly extending arm |33 extends rearwardly from .the annulus |32. A bearing or boss |34 is formed on the rear end of the upper arm |32 anda stationary shaft or pin |35 engages through the bearing boss |34. A flanged bearing liner |36 is mounted in the boss |34 and engages about the stationary shaft |35. The shaft |35 is formed below the boss |34 with a tapered portion |31 engaging in an upstanding boss |38, which is formed integral with the outer housing member I2; `The lower end of the tapered shaft portion |31 terminates in a reduced threaded stub |39, which is threaded into the boss |38. 'Ihe stub |35 is formed with a lubrioatingduct or channel |40 opening through the'lower end thereof and lateral ducts |4| are formed inthe upper shaft portion |35 and confront the bearing lining |36.

The housing |2 isformedwith an opening |42 communicating with the boss |38 so that a lubricant in the tubular housing I2 will enter the formed axially of the shaft |41.

between the bearing member 15 and the annulus |32 so that, as will be hereinafter described, the bracket structure '|30 Amay have a limited horizontal movement relative to the bearing member, 15.

An annulus |44 is loosely disposed about the` .bearing member 83 and is provided with a rearwardly extending arm |45 terminating in a bearing boss |46. A stationary shaft |41 similar to the shaft |35 engages through the boss |46 and is threaded, vas at |48, into a boss |49 formed integral with the housing |2 and disposed diamet-` rically opposite the boss |38. 'Ihe housing I2 is.

also formed with an opening or chamber |50, which communicates with a lubricating duct |5| The annulus |44 has. integral therewith a pair of forwardly extending ears |52, and a web |53 connects the.

two ears |52together. The bracket |30 is also provided with a pair of opposed ears |54 confronting the ears |62 and the ears |54 are secured to the ears |52 by fastening devices 155. An annular or cylindrical resilient member |56 isin; terposed between the ring or annulus |44 and the bearing housing 83 so that the ring or annulus |44 mayhavehorizontal swinging movement relativeI to the bearing member 83 with the shaft |41 as a fulcrum.

In `order `to provide a means whereby the bracket |30 may be steadied in its ,horizontal or lateral swinging movement, I have provided a roller |51 which is mounted on a pin |58 carried by the cap or plate 5|. The bracket |30 is provided with upper and lower guide members or tracks |59 and |60 between'which the roller |51 engages.

The housing |09 at its forward end is formed with an outwardly flared extension I 6|, which is f annular opening |68 therethrough. A cylindrical metal liner |69 engages in the opening |68 and is formed with a lower flange |10 engaging against the lower end of the boss |61. A vertically disposed trunnion or pin |1| is carried by an elongated bar |12, which is fixed by fastening members |13 to the knife bar 66. The trunnion 1| engages in a bearing cap |14 and the cap |14 engages in a resilient annulusV |15, which is interposed between the outer surface of the cap |14 and theinner surface of the cylindrical liner |69.

In the use and operation of this attachment the housing `Il) is adapted to be secured by bolts or the like, which engage through the flange |4 of the housing member The clutch member 3| is adapted to engage a complementary clutch member carried by the power unit, so as to provide forthe rotation of the shaft 2|.4 As the shaft 2| rotates the annulus 66 will be oscillated back and forth and this oscillating movement will be communicated to the split annulus 12 so as to effect a rocking of the shaft 82 and the In'vlew of the fact that the length or radius' of the crank 30 is shorter than the radius'from the ball |00 to the' rearpend of the pitman |02, l

the pitman |02 will be moved endwise coactive with the swinging movement thereof. This endwise movement of the pitman |02 will provide for the straight line or reciprocating movement of the knife bar and the hammering or vibration of the pitman |02 in its swinging movement relative to the knife bar |00 will be dampened or cushioned by the resilient cushion member |15.

Simultaneous Vwith the reciprocation of the knife bar |00 back and forth by swinging of the pitman |02, the force exerted on the pitman |02 bythe crank 95 will also exert a reverse move- Yment to the bracket |30. bracket |30 being swlngably mounted on the stationary diametrically opposed pins-or shafts |35 and |41 will be permitted a limited swinging movement determined by the cushioning members |43 and |50. The reverse swinging of the bracket |30 will likewise effect a reverse movement ofthe lower bar |03 and the guard members |05, which reverse movement will be substantially less in length than the reciprocating movement of the bar |00.

However, asthe lower bar |03 with'the guard" members |05 issubstantially heavier than the and operable by movement of said pitman for reciprocating said lower cutter means reversely from saidv upper cutter means while simultaneously supporting said pitman.

, 2. A mower attachment for a power device comprising a drive shaft, means at one end of said shaft for coupling said shaft to the power device, a lowercutter means, an upper cutter means arranged over said lower cutter means. said lower and upper cutter means being disposed at right angles to thelength of said shaft, a pitman connected at one end to said upper cutter means for reciprocating the latter, means connecting the -other end of said pitman withvsaid drive shaft, and means operatively connected with said pitman intermediate its end s and with said lower cutter means for reciprocating said lower cutter means reversely from said upper cutter means while simultaneously supporting said pitman.

3. A mower attachment for a power device comprising a drive shaft, a pair of reciprocable cutter members disposed at right anglespto said drive shaftVmeans connected with`one of said cutter members and with said drive shaft for re- A ciprocating said one cuttermember, and means ing a portion .of said,

knife bar |00 the reverse movement of the. guard bar |03 and the guards |05 will act as a counterbalancing means which counter-balances the reciprocation of the knife bar |00. The reciprocation or reverse movement of the bar |03 and the Yguards |05 will not only have a counter-balancing action with respect to the knife bar |00, but

will also provide a means whereby the material cut by the knife bar |00 will be prevented from lodging or sticking onto the guard members |00 and the bar |03. In this manner the material which is being cut by this device will not clog up the cutter, which is the case in devices of this type which do not provide for the reverse movement of the lower cutter bar and the guard members. Due to this counter-balancing of the cutter the knife bar may be operated at a relatively high speed without causing undue vibration to the power unit and its associated parts. The forward extension 0| of the bearing housing |09 is formed with' a fairly large opening |10 so that any loose material engaging on the flared extension |0| may freely drop through the opening |10. Y

The two telescoping housings and I2 are loosely connected together 4so that the outer housing |2 may swivel or rotate on the inner housing In this manner the device when in operation may freely follow any undulations in the ground or terrain independent of the movement of the powerunit. v

WhatIclaim is: e

1. A mower attachment for a power device comprising a drive shaft, means at one end of said shaft for coupling Said shaft to the power device, a lower cutter means, an upper cutter means arranged overv said lower cutter means, said lower and upper cutter means being disposed at right angles to the length of said shaft, a pitman connected at one end to said upper cutter means for reciprocating the latter, means connecting the other end of said pitman with said drive shaft, and means operatively connected with said pitman and said lower cutter means connected with the other cutter member supportiirstmeans and operable thereby whereby the force exerted to effect reclprocation of said one cutter member will simultaneously exert a force on said other cutter member to thereby effect reverse movement of said other cutter member relative to said one. cutter member: A

4. A mower attachment for a power device comprising a drive shaft, a pair of reciprocable cutter members disposed at right drive shaft, means connected with one of said cutter members and with said drive shaft for reciprocating said one cutter member, and means connected with the other cutter member and supporting a portion of said rst means whereby the force exerted to effect reciprocatlon of said one cutter member will simultaneously exert a force on said other cutter member to thereby effect reverse movement of said other cutter member which is substantially shorter in length than the length of movement of said one cutter member.

5. A mower attachment for a vpower device comprising a housing structure, a drive shaft in said structure, a pairof 'superposed reciprocable cutter members forwardly of said structure and disposed at right angles to said shaft, a pitman connected with said shaft and one of said cutter members for reciprocating said one cutter member, and means swingably carried by said housing, vpivotally connected with said pitman andiixed to said other cutter member whereby to pivotally support said pitman intermediate its ends and wherebythe force exerted to rock said Y pitman will also eifectswinging of said swingable means and a reverse movement of said other cutter member. Y

6. A mower attachment for a power device comprising a housing, means for attaching said housing to the power device, a. drive shaft rotatably carried by said housing, a. pair of Y superposed reciprocable cutter members forward- 1y of said housing and disposed at right angles to said shaft, a pitman operatively connected with said shaft and one of said cutter membersfor reciprocating said one cutter member, a. swingable member carrier by another part of said housing, a .supporting member fixed to the other cutter member and to ,said swingable angles to said member, and means carried by said supporting member pivotally supporting an intermediate portion of said pitman, rocking of said pitman in one direction effecting 'a swinging of' said swingable member in the opposite direction to thereby effect a reverse movement of said other cutter member.

'7. A mower attachment forA a' power device comprising a housing, means for attaching said housing to the power device, a drive shaft rotatably carried by said housing, a pair of superposed' reciprocable cutter members forwardly of said housing and disposed at right angles to said shaft, a pitman operatively connected with said shaft and one of said cutter members for reciprocating said one cutter member, a swingable member carried by another part 'of said housing, a supporting member fixed to the other cutter member and to'said swingable member, means carried by said supporting member pivotally I supporting an intermediate portion of said pitman, rocking of said pitman in one direction eifecting a swinging of said swingable member in the opposite direction to thereby effect a reverse movementof said other cutter member, and means carried by said housing and engaging said swingablemember for limiting the moveing, a. supporting member fixed to the other cutter member and to said swingable member, means carried by said/supporting member pivotally supporting an intermediate portion of said pitman, rocking of said pitman in one direc tion effecting a swinging of said swingable member in the opposite direction to thereby eifect a reverse movement of said other cutter member, and yieldable means carried by said housing and engaging said swingable member for`limiting the movement of said swingable member.

9.- A mower attachment for a power device comprising a housing, means for attaching said housing to the power device, a drive shaft rotatably carried by said housing, a pair of superposed reciprocable cutter members forwardly of said housing and disposed at right angles to said shaft, a pitman operatively connected with said shaft and one of said cutter members for reciprocating said one cutter member, a swingable member carried by another part of said housing, a supporting member fixed to the other cutter member and to said swingable member, means rarried by said supporting member pivotally supporting an intermediate portion of said pitman, rocking of said pitman in one direction effecting a swinging of said swingable'member in the opposite direction to thereby effect a reverse movement of said other cutter member, and means carried by said housing and engaging said swingable member for limiting the movement of said swingable member, said latter means including diametrcally opposed elements fixed to said housing, means fixed to said swingable member and encompassing said elements, and yieldable` means interposed between said elements and said latter mentioned means.

comprising a housing, means for attaching -said housing to the power device, adrive shaft rotat-- A ably carried by said housing, -a pair of superposed reciprocable cutter members forwardly of said housing and disposed at right yangles `to said shaft, a pitman pperativ'ely connected with said shaft andone of said cutter members for reciprocating said one cutter member, a swingable member carried by another part of said y housing, a supporitng member fixed to the other cutter member and to said swingable member, means carried by said supporting member pivotally supporting an intermediate' portion of said pitman, rocking of said pitman in one direction effecting a swinging 'of said swingable member in the opposite direction to thereby effect a reverse movement of said other cuttermember, and means 'carried by said housing and engaging said swingable member for limiting the movement of said swingable member, said latter means including diametrically opposed elements projecting from and fixed to said housing, annular members fixed to said swingable member and engaging losely about saidelements, and yieldable bushings interposed between said elements and said annular members for yieldably resisting movement of said swingable member relative to said housing.

11. A mower attachmentfor a power device comprising a housing, means for swivelly attaching said housing to the power device, a drive shaft rotatably carried by said housing, la pair of superposed reciprocable cutter members forwardly of said housing and disposed at right angles to said shaft, a pitman operatively connected with said shaft and one of said cutter membersfor reciprocating said one cutter member, a swingable member carried by another part of said housing, a supporting member fixed to the other cutter member and to said swingable member, and means carried by said supporting member pivotally supporting an intermediate portion of said pitman, rocking of said pitman in one direction effecting a swinging of said swingable member in the opposite direction to thereby effect a reverse movement of said other cutter member.

12. A mower attachment for a power device comprising a housing, means swivelly attaching said housing to the power device, a drive shaft rotatably carried by said housing, a pair of superposed reciprocable cutter members forwardly of said housing, a pitman connected at one end with one of said cutter members, -means connected with said drive shaft and the other end other cutter member.'V

13. A mower attachment for a power device comprising a housing, means swivelly attaching said housing tothe power device, a drive shaft rotatably carried by said housing, a pair of superposed reciprocable cutter membersV forwardly of said housing, a pitman connected at one end with one of said cutter members, wabble means connected with said drive shaft and the other end 10. A mower attachment for a power devicel oi' said pitman for translating the rotary motion of said shaft into oscillatory motion for rocking said pitman, swingable supporting means for the other cutter member carried by said housing, and pivotal means carried by said supporting means the latter for pivotally supporting said pitman from said housing, rocking of said pitman eil'ecting reciprocation of said one cutter member and also simultaneous reverse reciprocation 4oi.' said other cutter member. I

14. A mower attachment for .a power' device comprising a housing, means swivelly attaching said housing tothe power device, a drive vshaft rotatably carried by said housing, a pair oi' superposed reciprocable cutter members forwardly oi said housing, a pitman connected at `one end with one of said cutter members, means jconnected with said drive shaft and the other end of said pitman i'or translating the rotary motion of said engaging said pitman intermediate the ends` of 2 shaft into oscillatory motion for rocking said pito man, swingable supporting means foi` the other cutter member carried by said housing, means carried partly by said supporting means and partly bykan intermediate portion or said pitman supporting said pitman for'rocklng movement relative to said housing coactive with endwise movement of said pitman, the combined rocking and endwise movementot said pitman eiecting cation of said yother cutter member.

v 15. A mower attachment ,for a power device comprising a housing, a drive shaft rotatabl., carried by said housing,'.a pair o! superposed' reciprocable cutter members. means supportingA said members i'rom said housing at right angles to the length oi' saids'haft.- means connected with said shaft for reciprocatingboth oi said cutter members, and meansl swivelly attaching `said housing to said power device whereby saidI cutter members may rock laterally with respect to said power device.

EUSTACE L. ROSE. 

